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Jellyfish
Found in every ocean, jellyfish are not technically "fish." Jellies have an umbrella like structure that allows them to float beautifully in the water. Watch out though, some of them sting!
1,930 Questions
How many teeth does a jellyfish have?
no it does not
a jellyfish dose not have a brain heart eyes a skeleton a nervous system or sence of where it is
The humpback is a predator, taking krill and small schooling fish, such as herring, salmon, capelin and sand lance as well as mackerel, pollock and haddock in the North Atlantic. Krill and copepods have been recorded from Australian and Antarctic waters. Humpbacks hunt by direct attack or by stunning prey by hitting the water with pectoral fins or flukes
What category is sponge jellyfish crab?
Crabs are in the crustacean category, jellyfish are members of the cnidaria. Sponge are porifera.
Which zone does the jellyfish live in?
Box Jelly fish live in Australia, the great barrier reef witch is known to be a wonder of the world. There is a net to block them from coming in the great barrier reef, but the eggs travel through the holes and now box jelly fish live there. Your welcome.
Are jellyfish in danger of becoming extinct?
Most of them are not endangered but some are, like the freshwater Craspedacusta sowerbyi Lankester.
As of the year 2015 jellyfish are not endangered.
There are multiple types of jellyfish, you should try to distinguish which species you are talking about.
What kind of symmetry does a jellyfish have?
Jellyfish have radial symmetry.
Jellyfish are a part of a group called Cnidarians and the have Radial Symmetry.
radial symmatry. . . Means all planes about longitudinal axis wil give you two equal halves. .
What phylum and class do jellyfish belong to?
If Creation Wiki is anything to judge by, all jellyfish are in p. Cnidaria.
How long do moon jellyfish live?
The average lifespan of a jellyfish is about six to eight months.
Jellyfish lifespans typically range from a few hours (in the case of some very small hydromedusae) to several months. Life generally ends after the medusa has begun spawning. Life span varies by species. Most large coastal jellyfish live 2 to 6 months.
No silly.They swim peacefuly in the water catching their food so they can eat.
What are some marine animals that eat jellyfish?
Other species of jellyfish are among the most common and important jellyfish predators, some of which specialize in jellies. Other predators include tuna, shark, swordfish, sea turtles, and at least one species of Pacific salmon.
What do sponge jellyfish crab have common in?
They have a lot of basic stuff in common, like being made up of cells, being able to eat, do respiration, etc. I think your worksheet is looking for the highest level of commonality, probably that they are both (surprise!) animals! (A sea sponge is not a plant. A kitchen sponge is not the same thing as a sea sponge.) A sponge is the simplest of animals, but it was motile (it could move) (*when it was a baby sponge) and it's a heterotroph
(it eats other living things).
*They also both live in the sea!
How do jellyfish survive in ocean waters?
Jellyfish help to stir up the ocean as they move, researchers have found.
Using a green dye, scientists showed how the animals' umbrella-shaped bodies were a key factor in this mixing.
The distribution of heat, nutrients and chemicals helps maintain the marine environment and has an important influence on global climate.
Reporting in the journal Nature, the researchers said that marine animals of many shapes and sizes contributed to ocean turbulence.
Charles Darwin, grandson of the famous British naturalist, first discovered that animals stir up the oceans more than 50 years ago.
The influence of this "biogenic" or "Darwinian" mixing on the ocean environment has been under debate since then.
The wind and tides play a big part in mixing the oceans, but this study suggests that the role of biogenic mixing could be more significant than previously thought.
The research showed how small creatures - as well as very large sea mammals - create turbulence.
"This is important because the other proposed mechanism was simply that large animals stirred up the water as they swam," explained lead author John Dabiri from the California Institute of Technology (Caltech).
He and his colleague Kakani Katija showed exactly how jellyfish, which were between one and 10cm in diameter, "dragged water around" as they moved, demonstrating the effect by squirting a dye in front of the creatures.
The team had to dive with the jellyfish to demonstrate the effect
But, Dr Dabiri explained, the jellyfish were unlikely to be the "primary ocean mixers".
"Crustaceans - like copepods and krill - are likely the primary biogenic mixers, because there are so many of them," he explained. "We used jellyfish here, because of their uniform shape - and because they were relatively easy to study."
The principle behind the effect, Dr Dabiri explained, was aerodynamics. "When the animal is at depth, it will carry some of the colder, deeper water with it as it migrates upwards," he said.
"The shape of the animal is important, because the more streamlined it is, the less of a disturbance it causes. So a bullet-shaped animal will carry less water with it than a flatter, saucer-shaped animal."
Jonathan Sharples, principal researcher from the UK's Proudman Oceanographic Laboratory told BBC News that this mechanism was likely to be important in specific areas where there was a high density of marine life.
"In warmer surface water there are virtually no nutrients, and the transport of nutrients from the bottom water is very important for the single-cell plants that live there," he said.
"But much of the open ocean is like desert," he added, "and the density of these animals is unlikely to be sufficient (to cause mixing)."
The next step, Dr Dabiri said, was to find out where in the ocean, the phenomenon of biogenic mixing has the biggest effect.
What are the 5 life stages of a jellyfish cycle?
# jellyfish (medusoid, adult) # planula(hatchling) # polyp (polypoid) # strobila (polypoid) # ephyra (medusoid, immature) Not all jellyfishes have a polypoid stadium.
What jellyfish doesn't sting you?
The most dangerous species of jellyfish are Chironex fleckeri and Carukia barnesi, both belonging to the Class Cubozoa (box jellies).
What phylum does the jellyfish belong to?
The jellyfish phylum is called " Cnindaria " ( nye DAIR ee uh ) . nīd�e(�)r��
Does a jellyfish have a hydrostatic skeleton?
Yes, they do. Hydrostatic skeletons aren't bone, but fluid-filled cavities surrounded by muscles.
Please see the related link for more information.
How long does it take jellyfish eggs to hatch?
Clownfish eggs will hatch about 7-10 days after they are laid, depending on the water temperature. Each day you should check the eggs.When the eggs get a silver color, they will hatch that night. You will notice that each egg has a silver, reflective eye. This means that when the lights go out they will hatch. You must remove the clownfish fry from the tank and put them into the fry tank. To do this, turn off every filter and pump in the tank. There must be no current or flow in the tank. Once the lights have gone off, wait about 30 minutes and shine a bright flashlight into the water. A mag light works great. Do not shine the light directly at the eggs, this will delay the hatching process. The clownfish will be attracted to the light and swim towards it. Start a siphon with airline tubing and begin siphoning the clownfish fry into a bucket. This is usually easier with a helper.There also is a variation on this technique. The night of when the eggs are supposed to hatch you can remove the live rock that the eggs were laid on and put it into the breeding tank. Take care not to expose the eggs to air. If possible fill a bag with aquarium water and place it into the tank. Put the rock with the eggs on it into the bag and lift out the rock and bag. Place the bag underwater in the breeding tank and remove the rock. This method is ok but doesn't work if the clownfish laid their eggs on a large piece of live rock that is at the bottom of your tank.
How long do immortal jellyfish live?
Turritopsis dohrnii, is a hydrozoan commonly called "immortal jellyfish." These jellyfish have the ability to revert back to the polyp stage if they are under environmental stress. Their cells do this by changing what type of cells they are, called transdifferentiation.
Jellyfish have two major body forms throughout their life. The first form is called the polyp stage and is characterized by either a non-moving (sessile) stalk that catches food drifting by or a similar form that is free-floating. Their mouth and tentacles are located anteriorly, facing upwards. The second form looks like a saucer and is called the medusa stage. It is characterized by a round (radially symmetric) dome-shape body plan with food-catching tentacles hanging down. It is this form which is most able to respond to and interact with its environment and is also the form with which people are most familiar. Some jellyfish don't have a stalked stage. With few exceptions, jellies are dioecious, which means that each animal is either male or female. A group of animals releases sperm and eggs which may mix in the water column and become fertilized or, in the case of the moon jelly (Aurelia), the eggs become lodged in pits on the oral arms, which form a temporary brood chamber where fertilization takes place. After fertilization and initial growth, a larval form, called a planula, develops from the egg. The planula larva is small, and is covered with cilia, similar in appearance to a tiny hairy football. The planula larva settles onto a firm surface, and changes into a polyp. The polyp resembles a tiny sea anemone- cup-shaped with tentacles surrounding a single opening. Once the polyp begins reproducing asexually by budding, it's called a segmenting polyp, or a scyphistoma. New scyphistomae may be produced by budding or new, immature jellies called ephyra may be formed. These young jellies swim off and grow up into adults. Many jellyfish can bud off new medusae directly from the medusan stage also. Like all other cnidarians, jellyfish have stinging cells called cnidocytes which contains the stinging nematocysts on their tentacles. Whenever a prey comes in contact with a tentacle, hundreds to thousands of nematocysts fire one or another type of "hook and line" into the prey. These stinging cells are thus able to latch onto the prey and the tentacles bring the prey item into their large "mouth" for digestion.These cells are activated by a simple but precise nervous system called a nerve net which is located in the epidermis of the jellyfish. Impulses to these nerve cells are sent from the nerve rings that have collected information from the environment of the jellyfish through the rhopalial lappet, which is located around the animal's body. Jellyfish also have "eyes" or ocelli that cannot form images, but are sensitive to light. Jellyfish do not have a specialized digestive system, osmoregulatory system, central nervous system, respiratory system, or circulatory system. They are able to digest with the help of the gastrodermis that lines the gastrovascular cavity, where nutrients from their food is absorbed. They do not need a respiratory system since their skin is thin enough that oxygen can easily diffuse in and out of their bodies. Jellyfish move using a hydrostatic skeleton that controls the water pouch in their body to manipulate their movements. Most jellyfish are not dangerous to humans but a few are highly toxic, such as the Cyanea capillata. Contrary to popular belief, the menacingly infamous Portuguese Man o' War (Physalia) isn't actually a jellyfish, but a colony of hydrozoan polyps. Many aquaria, such as Monterey Bay Aquarium, Vancouver Aquarium, and Maui Ocean Center, feature jellyfishes in display. Often the tank's background is blue with the animals illuminated by side lighting to produce a high contrast effect. In natural conditions, many of the jellies are so transparent that they can be almost impossible to see. A group of jellyfish is often called a 'smack'. Many species of jellyfish can congregate into large swarms or 'blooms'. The formation of these blooms is a complex process that depends on ocean currents, nutrients, temperature and oxygen content.
Do jellyfish have exoskeletons?
Not any more; only conulatae (an extinct order of staurozoans) had exoskeletons.
no only like bugs n ants n some other stuff do, exoskeletons is where your skeleton is on the outside of your body like skin so no jelly fishs dont
